Effect of Ti substitution on dynamic and static magnetic properties for Ba3Co2Fe24−xTixO41Ba3Co2Fe24−xTixO41Hexaferrites

Dynamic and static magnetic properties of ceramic Ba3Co2Fe24−xTixO41Ba3Co2Fe24−xTixO41 with x  =0–0.6 have been studied. The results show that all Ba3Co2Fe24−xTixO41Ba3Co2Fe24−xTixO41 has c  -plane anisotropy and the anisotropy fields HθHθ increase with Ti substitution. The curve-fit shows that their complex permeability is composed of two components, namely gyromagnetic permeability from natural resonance and wall permeability from wall resonances. With Ti substitution, the real permeability first increases to the maximum at x  =0.3–0.45 and then decreases, which is attributed to the competition of gyromagnetic and wall permeability. In addition, the dynamic parameters (μ′0μ′0, μ″maxμ″max and fRfR) of the two resonances and their relations with the static parameters (4πMs4πMs and HθHθ) are also discussed.

► Effect of Ti substitution on static and dynamic magnetic properties for Ba3Co2Fe24−xTixO41Ba3Co2Fe24−xTixO41.
► c-Plane anisotropy with increased anisotropy fields with Ti substitution.
► Complex permeability is composed of two components of natural and wall resonances.
► Curve-fitting results and analysis for natural and wall resonances.
► The characteristics of real, imaginary permeability and resonance frequency for the two components.